ASTM F2467-06

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Designation: F2467 − 06
StandardPractice for
Measuring Static Sealing Pressure Using Pressure-
1
Indicating Film (PIF) in Transportation Applications
This standard is issued under the fixed designation F2467; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 A bolt micrometer or torque wrench for quantifying
fastener load or sequence or both. For yielded fastener
1.1 This practice covers a standard means for measuring
applications, torque versus yield or angle recording equipment
initial static sealing pressure in transportation applications.
is also required.
1.2 It uses a pressure-indicating film (PIF) that will record
3.3 Subassembly test stand with one set of mating parts of
the maximum load imprint of the seal-to-flange interfaces. The
the joint (minimum) and a complete set of fasteners.Anew set
imprints will vary in intensity based on load across and along
of fasteners for each run shall be used if the torque loading is
the interface.
high enough to cause plastic deformation of the bolts.
1.3 These imprints can be used to determine if initial load
3.4 Asufficient quantity of gaskets to complete the required
on the gasket is adequate to attain a seal. These imprints may
number of tests as agreed upon between producer and user.
also indicate correct bolt torque sequence. These imprints may
Reuse of gaskets after initial tightening is not allowed, unless
also be used to determine if the mating surface waviness or
approved by the user.
local flatness meets gasket requirements. Roughness is rarely
found by PIFs because peak-to-peak wavelengths are too short. 3.5 Manual densitometer or automatic scanning device for
PIF is very good at finding waviness (peak to peak > 2.5 mm) reading color density (optional).
and local flatness dips. PIFs provide an approximation of
4. Summary of Practice
maximum pressures, and do not take into account relaxation of
the joint after the torque sequence. Other methods involving
4.1 PIF is placed between a gasket or seal and one or both
dynamic measurement should be used if flange loading after
of the mating flanges. Using the specified torque sequence, the
relaxation is desired.
assembly is clamped together. After the specified waiting
period, the system is unclamped and the PIF removed. The
1.4 This standard does not purport to address all of the
visible color pattern denotes where clamp pressure is present.
safety concerns, if any, associated with its use. It is the
The approximate pressure can be determined from color
responsibility of the user of this standard to establish appro-
density using a reflective (optical) densitometer or an auto-
priate safety and health practices and determine the applica-
matic scanning device in conjunction with a computer conver-
bility of regulatory limitations prior to use.
sion program designed for the films. Follow the PIF supplier’s
guidelines with regard to how color density relates to pressure
2. Terminology
for a given PIF.
2.1 Definitions:
2.1.1 pressure-indicating film (PIF), n— film that will,
5. Significance and Use
under varying clamp forces, give a varying imprint or color
5.1 This practice is a screening tool and should be used in
density that correlates directly with the joint clamp force
conjunction with other more accurate real-time load-measuring
applied in a given area.
techniques.
3. Special Test Equipment and Materials
5.2 This practice covers the use of PIF, which is available in
several load ranges. This practice also covers the use of a
3.1 Pressure-indicating film (PIF) in the required pressure
manual or automatic scanning device to read indicated load.
range(s).
5.3 Limitations include those applications in which the PIF
may be kinked, twisted, or buckled. PIF does not withstand
1
This practice is under the jurisdiction ofASTM Committee F03 on Gaskets and
elevated temperature, low temperature, or fluid aging and does
is the direct responsibility of Subcommittee F03.10 on Composite Gaskets.
not take into account any relaxation of bolts, gasket materials,
Current edition approved Oct. 1, 2006. Published October 2006. Originally
or flange twisting, as it provides only the maximum attained
approved in 2005. Last previous edition approved in 2005 as F2467 – 05. DOI:
10.1520/F2467-06. pressure.
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F2467 − 06
6. Conditioning 9.3 Properly clean parts to ensure they are free of fluids and
other contaminants as this will affect color intensity.
6.1 Condi
...